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Sequoia A 1551 Industrial Road <br /> San Carlos 0 <br /> r <br /> (650)23 9602 9600 <br /> loAnalytical <br /> FAX(650)232-9612 <br /> www sequotalabs coin <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco##4409,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/03/02 10 10 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-6(L204085-07)Water Sampled 04/18/02 13 40 Received 04/18/02 18 15 -_ <br /> Purgeable Hydrocarbons as Gasoline 4000 1000 ugA 20 2040092 04/30/02 04/30/02 EPA 8021E P-01 <br /> Benzene 340 10 " <br /> Toluene 110 10 " <br /> Ethylbenzene 160 10 " <br /> Xylenes(total) 180 10 " <br /> Methyl ten-butyl ether ND 100 " <br /> Surrogate a,a,a-Trifluorotoluene 115% 70-130 ^ <br /> MW-7 (L204085-08)Water Sampled 04/18/02 12 03 Received 04/18/02 l8 15 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 2040093 04/30/02 04/30/02 EPA 8021E <br /> Benzene ND 0 50 " <br /> Toluene <br /> ND 0 50 " <br /> " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 878% 70-130 <br /> MW-8(L204085-09)Water Sampled 04/18/02 12 50 Received_04118102 18 15 <br /> Purgeable Hydrocarbons as Gasoline 300 50 ugA 1 2040093 04/30/02 04/30/02 EPA 8021B P-02 <br /> Benzene 4 0 0 54 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 1 2 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Trifluorotoluene 108% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 16 <br />